#ei-main-container {
  width: 840px;
  height: 600px;
}

#ei-main-container > h1{
  font-size: 20px;
  text-align: center;
}

#ei-table-container{
  width: 800px;
  height: 400px;
  margin: 0 20px 0 20px;
}

#ei-button-container{
  position: absolute;
  width: 100%;
  height: 40px;
  top: 520px;
  /*设置容器内的组件居中显示*/
  display: flex;
  justify-content: center;
}
